Arctic blast to accompany major winter storm, send temperatures plunging for 230 million

The much-advertised, long-lasting Arctic outbreak with ties to the polar vortex will be accompanied by a significant winter storm over the weekend. Threat level: The storm is set to deliver upwards of a foot of snow in parts of the Plains, Midwest and Appalachians, with somewhat lower amounts for Washington, D.C., Baltimore and potentially Philadelphia as well. Multiple states are forecast to see a thick layer of ice build up that could lead to...